固冲发动机补燃室内硼颗粒流碰撞过程分析  

Analysis on collisional process of boron particles in the afterburner of ducted rocket

作　　者：肖云雷[1] 夏智勋[1] 胡建新[1] 方传波[1] 

机构地区：[1]国防科技大学高超声速冲压发动机技术重点实验室,长沙410073

出　　处：《固体火箭技术》2013年第3期329-333,共5页Journal of Solid Rocket Technology

基　　金：国家自然科学基金(51276194)

摘　　要：为研究固体火箭冲压发动机补燃室内颗粒流撞击掺混过程,文中从微观角度对颗粒碰撞过程进行了受力分析,选取了影响碰撞过程的主要作用力(粘性力和碰撞力)的计算模型,对补燃室内颗粒流的运动状态进行了数值模拟,从力学角度对碰撞结果进行了分析。结果表明,d1=1μm和d2=10μm的硼颗粒在补燃室入口处的一次碰撞不会团聚,碰撞后反弹,然后再碰撞,在这个过程中消耗能量,相对速度减小,直至当促使分离的碰撞力小于促使结合的粘性力时,颗粒团聚。To study the collisional process of the particles in afterburner of the ducted rocket, force analysis on the particles during collision in a microcosmic scale was given in this paper. Based on the computational model of viscous force and collisional force, which are the two main forces that have effect on the collisional process, numerical simulation on movement of the particles in the afterburner was conducted and analysis of results of the collision was performed from a mechanical angle. Results indicate that in the first collision, the boron particles of d1 = 1 p.m and d2 = 10 μm rebound, instead of agglomeration. After that, similar process will happen, during which energy is consumed and relative velocity is reduced, till the collisional force enabling the separation is smaller than the viscous force that combine the particles.

关 键 词：固体火箭冲压发动机 补燃室 硼颗粒 碰撞 

分 类 号：V431[航空宇航科学与技术—航空宇航推进理论与工程]